This is my first time doing anything like this.. halp

I recently got a second hand Wii thinking "Eh, may as well see what that homebrew jazz is all about". But I don't even know where to start.
I have version 3.4E. I thought I'd turn to youtube for a quick video tutorial, but it's all just 12 year olds who don't quite understand words yet.. If they can figure it out, it must be pretty simple.. right? RIGHT? Just some quick links to what I need would be a big help. Maybe some miscellaneous info too